Wrench.



7 Patented May 20, I902. J. D. MGFARLAND, In.

. WRENCH.

(Application filed Oct. 2a, 1901.

2 Sheets-$heet I.

(No Model.)

3 6 v n w ,\l

vii. w

Patented May 20 J. n. MOFARLAND, In.

WRENCH.

(Application filed occ. 28,-190L') (No Model.)

l JAMES D. MCFARLANQ R, onsANnRArtcisoo, CALIFORNIA, nss elvon on ONELHALF :To oHN BBUCKMAIQ'LOF SAN FRANCISCO, CALIFORNIA.

srrtezstoeirrlloivgfor m part of' llette' rs int nt No. 700,359, dated. May 20, 19o2.:- i i r "Application iedoottb' rzs, 1120;. Serial No. 80,221. k lometer.

T aZZzOhom itirztctyoortcermi Be it known that I, JAMES D. MCFARLAND,

'Jr., a citizen of the United States, residing in i the city and county of San Francisco, State of: California, have invented an Improvement in Wrenches; and I hereby declarejthe follow-.

ing to be a full, clear, and-'eXact-description of the same.

My invention relates to improvements in re wrench'es such as may be used for nuts, pipes, and the like. Its purpose is tojp'rovideade .vice that can be operatedin' a smallcoin pass, that Will have a wide range of difierentfsizesy of pipe, and with which'wrench"it isnot nec,

r5 essary to renga'gethe object at e ch; etion of the handle. r

It'consists of a handle having anenlarged head in which ajaw is revolubly" mounted,

. s'aidjaw composed of indeilnande'ntly-revoln 2o ble inembers,jaw-openings in said members which are adapted to coincide, and means'for turning the members to-engage the/pipe.

'Italso includes details vvhiclrwill be rno re fully set forth hereinafter, having reference to the accompanying drawings, -in which Figure 1 is a view ofjithe wrench. I Fig.

is a section ofthesamelon line 00 m of Fig. 1. Fig. 3 shows a modification. Fig. 4 is a 's'ection of the same on line 112g, Fig. 3.

0' and 6 are detailviewsof the respective'ja ws A represents a handle or stock having'an enlarged head 2 with a circular opening, in Which is contained a circular revoluble jaw. In Figs. 1 and 2jth'is jaw is shown composed of two outer disks 3, firmly united together,

.so as to be revolnble'i'nunison. In this case.

they are integral with an annular flange 4:, which is turnable in a corresponding groove or guide in the circular opening of the head 2,

- tions or notches 6, while the handle carries a spring-pressed pawl 7, adapted to engagethe notches and revolve the jaw when the handle is actuated. Inthe space between the disks 3 another disk or complementary'jaw memher Sis revoluble, the outer jawsforming a 40' by which ineans'the jaw'is retained in place.

the'bottom of the opening in the-member 8 each, other and sotendfto grasp the'ipipe more' I" tightlyn x .volved' to inclose the pipe isufficientlyjto i i-1i 'as thy'can be made to bear by the fingers of r H the operator, they are clamped together' to housing,qas it were, for the disk, 2 This disk has an opening coinciding'when thejaws are I opened-with the opening 5. The depth of the opening 5 depends ontlie diameter ofthe 1 largest pipe to be engaged an'd jcontained '55 within theperipheryofthe ja'w. "j-l'lhebottonl of the jaw-opening of the oiiter disks or jawmember 3 is concaved, as shown M39, while is'convexed, as shown at 10." The walls and the two members 3 and 8 ar'feturped "inlrela tion to each other, so astoI-inave-their-ja I openings coineide,l't he "serrations *u ponthe two mernberswill' allbe pitched, in the zsamef I direction? relatively; but whenfthe, members Q a'refin engagem'ent with a pipe, .a'si show n in; Fig. '3, the se rrations w'ill jpitch opposite] yfto In operation a pipe of any diain eterl ess'than' the depth of the opening 5 1s} inserted into; the jaw-opening. I Themember Si'sKthenr'esure engagement. The turning Of'theLmeIm ber Sisfeffected by meansjof a:pin 1 l. .,W;hen i 1 bothjaws arebearing as'firm ly u'ponthe pipe; 7

prevent their reopening by means of ascrew 13, threaded in one of the disks3 and pressingagainst the jawjS. The handle is-then oscillated to revolve the jaws. tqAs power is, i applied the members engage the pipe more tightly, because the serrationsor teeth on the twomembers act oppositely upon the pipe, andteud to contractthe jaw-opening more J and more; i

g The pipe is released byloosening the clamp-screw .13 to' allo'withe jaw 8 toturn in the other direction. l i I With this vwrench afpipe is engaged by the f teeth but once, for the jaws donot release their grip with each oscillation of the handle, 1 and in consequence a pipe willnot be marred, as it would be by the erdinarylwrenehes. In Figs. 3, at, 5, and'6 'I have "sliown'another form of revoluble jaw. In this case I-use'in-, I

depjendently-revoluble members but the con-- tral'one 8' is nowthe driving member. and. I'co bottom' of the openings arefsuitably serrated, f .so as to insurea good grip 'onthe pipe.v ;,W;he' ncarries the outer disks or member 3'. This central member has a peripheral guide-flange 4", with perforations 6, which engage the pawl carried by the handle or stock. The bottom of the jaw-opening of the member 8 has a depression or notch 12, which is adapted to receive the lugs 14 on the adjacent faces of the disks 3. The latter are provided with jaw-openings, which are adapted to coincide with the opening in the member 8. A setscrew 13, threaded in the lug portion of the disks 3', holds the latter together. A small space is left between the adjacent ends of the lugs 14 when the disks 3' are in place against the jaw 8, so that by tightening the set-screw 13' the two members are firmly bound together and are prevented from turning in relation to each other. The head of the screw is .recessed, as shown in Fig. 6, so that it is flush with the surface of the outer jaw. As limited by the pin 11, as in Fig. 1, or by the lugs 14, as in Fig. 3, the movement of one jaw member upon the other is practically that of a half-revolution, which is sufficient to engage any size of pipe that can enter the jawopening. Ordinarily the width of the opening 5 is such that the idle member 8 or 3, as the case may be, will not fall out; but, if desired, one or the other of the adjacent faces of the two members could be provided with a suitable annular tongue and the opposite face with a corresponding groove, so as to insure the proper rotation of one member within the other when the idle member is moving across the opening of thedriving member.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. The combination in a wrench of a handle having an enlarged head, and a jaw consisting of two independently-revoluble jaw in embers mounted in said head.

2. The combination in a wrench of a handle, and a revoluble jaw carried thereby, said jaw consisting of a plurality of slotted disk jaws independently revoluble in relation to each other.

3. The combination in a wrench of a handle,

a revoluble jaw mounted therein, an opening in said jaw for the admission of ihe pipe or other article to be engaged, and an independently-revoluble jaw for contracting said opening to engage articles of various sizes.

4. The combination in awrench of a handle, a revoluble jaw mounted thereon and adapted to be actuated by the oscillation of the handle, said jaw consisting of independentlyrotatable members and jaw-openings in these members which are adapted to coincide to admit an article to be engaged.

5. The combination in a wrench of a handle having an enlarged head, a circular opening in said head, a circular jaw mounted insaid opening, said jaw consisting of two members, one carried by and rotatable independentlyof the other, and means by which said members may be revolved in unison.

6. The combination in a wrench of a handle having an enlarged head, a circular revoluble jaw set into said head, said jaw consisting of members rotatable independently of each other, jaw-openings in said members adapted to coincide, and means for rotating one of said members to contract said jaw-opening.

7. The combination in a wrench of a handle having a circular opening, revoluble jaw members mounted in said opening, one of said members adapted to be driven by the oscillation of the handle, the other of said members carried by but turnable independently of the other member, and means for locking said members so that such independent movement is prevented.

In witness whereof I have hereunto set my hand.

JAMES D. MCFARLAND, JR.

Witnesses:

S. H. NoURsE, JEssIn C. BRoDIE. 

